Cracking Mechanism of Laser Cladding Rapid Manufacturing 316L Stainless Steel

Jian Li Song; Yong Tang Li; Qi Lin Deng; Zhong Yang Cheng; Bryan Chin

doi:10.4028/www.scientific.net/KEM.419-420.413

Paper Titles

Research on Manufacturing Execution System Oriented to Agile Manufacturing
p.397

Wavelet Method for Roughness of Micro-EDM’s Surface Contour Lines
p.401

Experimental Research of Pneumatic Drop-on-Demand High Temperature Droplet Deposition for Rapid Prototyping
p.405

Flow Field Analysis of Gas Jets from Nozzles for Gas-Assisted Laser Cutting
p.409

Cracking Mechanism of Laser Cladding Rapid Manufacturing 316L Stainless Steel
p.413

Dynamic Behavior of the Forging Manipulator under the Press Motions
p.417

Dynamic Analysis of Wafer Slicing by Using Multi Wire Saw
p.421

Experimental Investigation on Electrochemical Micro Machining of Complex Shape Parts
p.425

Numerical and Experimental Studies of the Precision Forging of a Screw Propeller
p.429

HomeKey Engineering MaterialsKey Engineering Materials Vols. 419-420Cracking Mechanism of Laser Cladding Rapid...

Cracking Mechanism of Laser Cladding Rapid Manufacturing 316L Stainless Steel

Abstract:

Laser cladding rapid manufacturing technology is a kind of new developed advanced manufacturing technology integrating the advantages of rapid prototyping manufacturing and laser cladding surface modification. Due to the complex thermo-physical and metallurgical factors in the deposition process, the cladding layer is liable to crack, which seriously impedes the industrial application of this technology. Experiments of laser cladding rapid manufacturing 316L stainless steel were carried out. The cracking behavior and phenomena has been observed, cracking mechanism of 316L stainless steel was investigated by means of microstructure characterization and phase analysis with optical microscopy (OM), X-Ray diffraction (XRD), scan electronic microscopy (SEM) and phase diagram analysis. Factors influencing the cracking susceptibility has also been studied. Results show that the cracks of 316L stainless steel were hot solidification cracks caused by the high residual stress and separating of the liquid films among dendrites. Through the optimization of process parameters, adding protective atmosphere, etc. cracking sensitivity has been effectively reduced and crack free 316L stainless steel components have been obtained.